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Eodiscidae ✝
| Description | Eodiscidae is a family of agnostid trilobites that lived during the final Lower Cambrian (late Toyonian) and the Middle Cambrian. They are small or very small, and have a thorax of two or three segments. Eodiscidae includes nine genera (see box). From Wikipedia article at https://en.wikipedia.org/wiki/Eodiscidae, which is released under the Creative Commons Attribution-Share-Alike License 3.0. | ||||||||||||||||||||||||||||||||||||||||||
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| Source Data |
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| Rank | family | ||||||||||||||||||||||||||||||||||||||||||
| Taxonomy (GBIF) | Life : Animalia : Arthropoda : Trilobita : Agnostida : Eodiscidae | ||||||||||||||||||||||||||||||||||||||||||
| Taxonomy (PBDB) | Life : Animalia : Arthropoda : Trilobita : Eodiscida : Eodiscidae | ||||||||||||||||||||||||||||||||||||||||||
| Taxonomic Status (GBIF) | accepted | ||||||||||||||||||||||||||||||||||||||||||
| Classification (PBDB,GBIF) |
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| Scientific Name | Eodiscidae | ||||||||||||||||||||||||||||||||||||||||||
| Opinions (PBDB) |
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| Status (PBDB) | extinct | ||||||||||||||||||||||||||||||||||||||||||
| Taxon Size (PBDB) | 32 | ||||||||||||||||||||||||||||||||||||||||||
| First Recorded Appearance | 541 - 513 Ma Cambrian | ||||||||||||||||||||||||||||||||||||||||||
| Last Recorded Appearance | 441 - 439 Ma Silurian | ||||||||||||||||||||||||||||||||||||||||||
| Environment | marine (based on Trilobita) | ||||||||||||||||||||||||||||||||||||||||||
| Motility | fast-moving (based on Trilobita) | ||||||||||||||||||||||||||||||||||||||||||
| Diet | carnivore (based on Trilobita) | ||||||||||||||||||||||||||||||||||||||||||
| Ontogeny | molting,addition of parts (based on Trilobita) | ||||||||||||||||||||||||||||||||||||||||||
| Ecospace Comments | BODY SIZE: Based on component genera; 2 of 2 genera share 1 to < 10 length, 2 of 2 share 1 to < 10 width. | ||||||||||||||||||||||||||||||||||||||||||
| Taphonomy | low Mg calcite, chitin (based on Trilobita) | ||||||||||||||||||||||||||||||||||||||||||
| Primary Reference (PBDB) | C. B. Skovsted. 2006. Small shelly fauna from the upper Lower Cambrian Bastion and Ella Island Formations, North-East Greenland. Journal of Paleontology 80(6):1087-1112 | ||||||||||||||||||||||||||||||||||||||||||
| Wikipedia | https://en.wikipedia.org/wiki/Eodiscidae |
Fossil Distribution
Subtaxa
| Name | Status | Common Name(s) | Fossil Occurrences | Oldest | Youngest |
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| Chelediscus ✝ genus | accepted (GBIF) listed (PBDB) | ||||
| Dawsonia ✝ genus | accepted (GBIF) listed (PBDB) | 13 | 530 Ma Cambrian | 441 Ma Silurian | |
| Eodiscus ✝ genus | accepted (GBIF) listed (PBDB) | 10 | 520 Ma Cambrian | 513 Ma Cambrian | |
| Helepagetia ✝ genus | doubtful (GBIF) listed (PBDB) | 1 | 501 Ma Cambrian | 501 Ma Cambrian | |
| Macannaia ✝ genus | doubtful (GBIF) listed (PBDB) | 6 | 513 Ma Cambrian | 513 Ma Cambrian | |
| Microdiscus genus | accepted (GBIF) | No associated record in PBDB | |||
| Opsidiscus ✝ genus | accepted (GBIF) listed (PBDB) | 5 | 513 Ma Cambrian | 505 Ma Cambrian | |
| Pagetia ✝ genus | accepted (GBIF) listed (PBDB) | 134 | 516 Ma Cambrian | 501 Ma Cambrian | |
| Pagetides ✝ genus | accepted (GBIF) listed (PBDB) | 28 | 541 Ma Cambrian | 501 Ma Cambrian | |
| Sinopagetia ✝ genus | doubtful (GBIF) listed (PBDB) | 4 | 513 Ma Cambrian | 513 Ma Cambrian | |
Synonymy List
| Year | Name and Author |
|---|---|
| 1913 | Eodiscidae Raymond |
| 1979 | Eodiscidae Palmer and Halley p. 76 |
| 1983 | Eodiscidae Ahlberg |
| 1997 | Eodiscidae Whittington et al. p. 400 |
| 2002 | Eodiscidae Landing et al. p. 300 |
| 2006 | Eodiscidae Skovsted |
| 2011 | Eodiscidae Adrain p. 104 |
References
Data courtesy of: PBDB: The Paleobiology Database, Creative Commons CC-BY licenced. , GBIF: the Global Biodiversity Information Facility, various licences, iDigBio, various licences, and EOL: The Encyclopedia of Life (Open Data Public Domain). Because fossils are made of minerals too!
